/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package Control;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
import org.apache.avalon.framework.logger.ConsoleLogger;
import org.apache.avalon.framework.logger.Logger;
import org.apache.fop.apps.Driver;
import org.apache.fop.apps.FOPException;
import org.xml.sax.InputSource;

/**
 *
 * @author ADMIN
 */
public class ConverToPDF extends HttpServlet {

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        try {
            String path = getServletContext().getRealPath("/");
            String xslPath = path + "XSL/CheckOutFO.xsl";
            String xmlPathCart = path + "xml/cart.xml";
            String foPath = path + "XSL/CheckOutFO.fo";
            methodTrAX(xslPath, xmlPathCart, foPath);
            File file = new File(foPath);
            FileInputStream input = new FileInputStream(file);

            ByteArrayOutputStream out = new ByteArrayOutputStream();
            response.setContentType("application/pdf");
            Driver driver = new Driver(new InputSource(input), out);
            Logger log = new ConsoleLogger(ConsoleLogger.LEVEL_WARN);
            driver.setRenderer(Driver.RENDER_PDF);
            driver.run();
            byte[] content = out.toByteArray();
            response.setContentLength(content.length);
            response.getOutputStream().write(content);
            response.getOutputStream().flush();

        } catch (FOPException ex) {
            ex.fillInStackTrace();
        } finally {
        }
    }

    private void methodTrAX(String xslPath,String xmlPathCart, String output) {
        try {
            TransformerFactory tf = TransformerFactory.newInstance();
            StreamSource xstlFile = new StreamSource(xslPath);
            Transformer trans = tf.newTransformer(xstlFile);
            StreamSource xmlFile = new StreamSource(xmlPathCart);
            StreamResult htmlFile = new StreamResult(new FileOutputStream(output));
            trans.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
            trans.transform(xmlFile, htmlFile);
        } // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
        catch (TransformerConfigurationException ex) {
            ex.printStackTrace();
        } catch (TransformerException ex) {
            ex.printStackTrace();
        } catch (FileNotFoundException ex) {
            ex.printStackTrace();
        }
    }
    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">

    /**
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
